Question about a UFC fighter's style.

[Isshin-Vegg]

Jon Fitch is my favorite UFC fighter. He is 26-3-1-1(the second one is a no contest before his UFC career). Anyways my question to you guys is; Is Jon Fitch's Guerrilla Jiu-Jitsu any different from BJJ, and is the Gracie who teaches Jake Shields and the Diaz's any different? Or are they the same, or even just the same but adapted for MMA?

[Groinstrike]

"Guerilla Jiu-Jitsu" is a system of grappling created by Dave Camarillo blends together aspects of BJJ with aspects from Judo. So i assume a large emphasis is put on throws and takedowns, atleast more so than other systems of BJJ?????